ProSoft Technology CompactLogix MVI69E-MBS User Manual page 45

MVI69E-MBS ♦ CompactLogix™ Platform
Modbus Serial Enhanced Communication Module
Parameter
Enable
Internal Address
Poll Interval
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Description
Value
0 to 4 This field defines whether the command is to be executed
under certain conditions.
Disabled (0) = The command is disabled and is not executed
in the normal polling sequence.
Continuous (1) = The command is executed each scan of the
command list if the Poll Interval (see below) is set to zero. If
the Poll Interval is set to a nonzero value, the command is
executed when the interval timer expires.
Conditional (2) = For write commands only. The command
executes only if the internal data associated with the
command changes.
Bit/Word Override upon Error (3) = For read commands
only. If a command error occurs, the module overrides the
associated database area with the Override Value Upon Error
parameter value.
Float Override upon Error (4) = For read commands only. If
a command error occurs, the module overrides the associated
database area (2x word count) with the Override Value Upon
Error parameter value.
Specifies the module's internal database register to be
0 to 9999
(word-level) associated with the command.
or
0 to 159,999 For Modbus functions 3, 4, 6, and 16, this parameter is
(bit-level) interpreted as a word-level or register-level address with an
allowable range of 0 to 9999.
For Modbus functions 1, 2, 5, and 15, this parameter is
interpreted as a bit-level address with an allowable range of 0
to 159,999. Note: This bit address range is available with
ProSoft Configuration Builder (PCB) v4.6 or later. Previous
versions have a range of 0 to 65535.
If the command is a read function, the data read from the
slave device is stored beginning at the module's internal
database register value entered in this field. This register
value must be in the Read Data area of the module's memory,
defined by the Read Register Start and Read Register Count
parameters in the Module section.
If the command is a write function, the data to be written to the
slave device is sourced beginning from the module's internal
database register specified. This register value must come
from the Write Data area of the module's memory, defined by
the Write Register Start and Write Register Count parameters
in the Module section.
Note: When using a bit level command, you must define this
field as a bit address. For example, when using function
codes 1 or 2 for a Read command, you must enter a value of
160 to place the data starting at bit 0 of module memory 10.
Think of it as the 160th bit of module memory (Module
memory register 10 * 16 bits per register = 160). Similarly, use
this formula for function codes 5 or 15 for writing bits.
0 to 65535 Specifies the minimum interval between executions of
(1/10 second) continuous commands (Enable code = 1).
Configuring the MVI69E-MBS Using PCB
User Manual
Page 45 of 159